551565

Appears in sequences

• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, -1), (1, -1, 0), (1, 0, 1)}.at n=14A148123
• The hyper-Wiener index of the triangular graph T(n) (n >= 1).at n=35A228317